Entanglement of single-photons and chiral phonons in atomically thin WSe${}_2$

Abstract

Quantum entanglement is a fundamental phenomenon which, on the one hand, reveals deep connections between quantum mechanics, gravity and the space-time; on the other hand, has practical applications as a key resource in quantum information processing. While it is routinely achieved in photon-atom ensembles, entanglement involving the solid-state or macroscopic objects remains challenging albeit promising for both fundamental physics and technological applications. Here, we report entanglement between collective, chiral vibrations in two-dimensional (2D) WSe${}_2$ host --- chiral phonons (CPs) --- and single-photons emitted from quantum dots (QDs) present in it. CPs which carry angular momentum were recently observed in WSe${}_2$ and are a distinguishing feature of the underlying honeycomb lattice. The entanglement results from a "which-way" scattering process, involving an optical excitation in a QD and doubly-degenerate CPs, which takes place via two indistinguishable paths. Our unveiling of entanglement involving a macroscopic, collective excitation together with strong interaction between CPs and QDs in 2D materials opens up ways for phonon-driven entanglement of QDs and engineering chiral or non-reciprocal interactions at the single-photon level.

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Cited by in corpus (53)

• Valley Phonons and Exciton Complexes in a Monolayer Semiconductor
• Orbital magnetic moments of phonons
• Emerging Photoluminescence from the Dark-Exciton Phonon Replica in Monolayer WSe2
• Chiral phonons probed by X rays
• Giant effective magnetic fields from optically driven chiral phonons in 4$f$ paramagnets
• Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WSe2
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe${}_2$
• Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments
• Exciton g-factors in monolayer and bilayer WSe${}_2$ from experiment and theory
• Identifying defect-related quantum emitters in monolayer WSe${}_2$
• Chiral Phonons in Chiral Materials
• Chiral Phonon Induced Spin-Polarization
• Chiral phonons and pseudo-angular momentum in non-symmorphic systems
• Structural Chirality and Electronic Chirality in Quantum Materials
• Intrinsic Donor-Bound Excitons in Ultraclean Monolayer Semiconductors
• Unconventional interlayer exchange coupling via chiral phonons in synthetic magnetic oxide heterostructures
• Weyl phonons in chiral crystals
• Chiral Phonons in Moiré Superlattices
• Flipping exciton angular momentum with chiral phonons in MoSe${}_2$/WSe${}_2$ heterobilayers
• Chiral valley phonons and flat phonon bands in moiré materials
• Selective observation of enantiomeric chiral phonons in $\alpha$-quartz
• Adiabatic dynamics of coupled spins and phonons in magnetic insulators
• Bell correlations between light and vibration at ambient conditions
• Breakdown of Raman Selection Rules By Fröhlich Interaction in Few-Layer WS${}_2$
• Electrical Control over Phonon Polarization in Strained Graphene
• Electric field-induced nonreciprocal spin current due to chiral phonons in chiral-structure superconductors
• Phonon chirality manipulation mechanism in TMD interlayer-sliding ferroelectrics
• Exciton-activated effective phonon magnetic moment in monolayer MoS2
• Electrically Controlled Interfacial Charge Transfer Induced Excitons in MoSe2-WSe2 Lateral Heterostructure
• Theory of spin magnetization driven by chiral phonons
• Chiral phonons induced from spin dynamics via magnetoelastic anisotropy
• Chiral phonons entangled with multiple Hall effects and unified convention for pseudoangular momentum in 2D materials
• Interplay of energy and charge transfer in WSe2/CrSBr heterostructures
• Chiral phonons in binary compounds $A$Bi ($A$ = K, Rb, Cs) with P2${}_1$/c structure
• Phonon Edelstein effect in chiral metals
• Chiral magnon-polaron edge states in Heisenberg-Kitaev magnets
• Electrically Controllable Chiral Phonons in Ferroelectric Materials
• Spin-spin interaction mediated by chiral phonons
• Physics of Phonons in Systems with Approximate Screw Symmetry
• Anomalous circular phonon dichroism in transition metal dichalcogenides
• Single charge control of localized excitons in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides
• Group Theory Analysis of Phonons in Monolayer Chromium Trihalides and Their Janus Structures
• Anomalous phonon magnetic moments
• Chiral phonon in the cubic system based on the Laves phase of $A$Bi${}_2$ ($A=$K, Rb, Cs)
• Gate-tunable chiral phonons in low-buckled group-IVA monolayers
• Dynamical Orbital Angular Momentum Induced by Circularly Polarized Phonons
• Advancements in Entangled Photon Pairs in 2D Van der Waals Materials for On-chip Quantum Applications
• Supercurrent-induced phonon angular momentum
• Ellipticity-Controlled Bright-Dark Coherence Transition in Monolayer WSe2
• Radiative properties of quantum emitters in boron nitride from excited state calculations and Bayesian analysis
• Pseudo-chiral phonon splitting from octupolar magnetic order
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems